IDK man, changes I guess

fs.go

@@ -9,6 +9,31 @@ import (
 	"strings"
 )
 
+// fileKind is a type of file the editor opens: what the open dialog and the
+// built-in file browser show.
+type fileKind struct {
+	Title    string
+	Label    string // file filter name
+	Exts     []string
+	Multiple bool
+}
+
+var fileKinds = map[string]fileKind{
+	"video":    {Title: "Add videos", Label: "Video files", Exts: mediaExts, Multiple: true},
+	"captions": {Title: "Load captions", Label: "Subtitle files", Exts: captionExts},
+}
+
+// captionExts are the caption files the editor loads (see captions.go).
+var captionExts = []string{"srt"}
+
+// fileKindOf returns the named file kind, videos by default.
+func fileKindOf(name string) fileKind {
+	if k, ok := fileKinds[name]; ok {
+		return k
+	}
+	return fileKinds["video"]
+}
+
 type fsEntry struct {
 	Name string `json:"name"`
 	Path string `json:"path"`
@@ -23,6 +48,7 @@ func (a *App) handleFSList(w http.ResponseWriter, r *http.Request) {
 	q := r.URL.Query()
 	dir := strings.TrimSpace(q.Get("path"))
 	showAll := q.Get("all") == "1"
+	exts := fileKindOf(q.Get("kind")).Exts
 	home, _ := os.UserHomeDir()
 	if dir == "" {
 		dir = home
@@ -57,7 +83,7 @@ func (a *App) handleFSList(w http.ResponseWriter, r *http.Request) {
 		}
 		if !isD && !showAll {
 			ext := strings.ToLower(strings.TrimPrefix(filepath.Ext(name), "."))
-			if !slices.Contains(mediaExts, ext) {
+			if !slices.Contains(exts, ext) {
 				continue
 			}
 		}